performing or able to perform its regular function; "a functioning flashlight"[ant: malfunctioning ]

process or manner of functioning or operating; "the power of its engine determines its operation"; "the plane's operation in high winds"; "they compared the cooking performance of each oven"; "the jet's performance conformed to high standards"[syn: operation ]

noun

operation , performance , reaction , working

adjective

alive , going , operating , operative , running , working